Properties of the Number 16005

Sixteen Thousand Five

Basics

Value: 16004 → 16005 → 16006

Parity: odd

Prime: No

Previous Prime: 16001

Next Prime: 16007

Digit Sum: 12

Digital Root: 3

Palindrome: No

Factorization: 3 × 5 × 11 × 97

Divisors: 1, 3, 5, 11, 15, 33, 55, 97, 165, 291

Polygonal

Triangular: No

Square: No

Pentagonal: No

Hexagonal: No

Heptagonal: No

Tetrahedral: No

Today's Target

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Representations

Binary: 11111010000101

Octal: 37205

Duodecimal: 9319

Hexadecimal: 3e85

Square: 256160025

Square Root: 126.51086909827156

Classification

Fibonacci: No

Bell Number: No

Factorial Number: No

Regular Number: No

Perfect Number: No

Special

Kaprekar Constant: No

Munchausen Constant: No

Armstrong Number: No

Kaprekar Number: No

Catalan Number: No

Vampire Number: No

Taxicab Number: No

Super Prime: No

Friedman Number: No

Fermat Number: No

Cullen Number: No

OEIS Sequences

Augmented amicable pairs (larger member of each pair). A15630

Triangle read by rows: T(n,k) is the number of k-matchings of the corona K'(n) of the complete graph K(n) and the complete graph K(1); in other words, K'(n) is the graph constructed from K(n) by adding for each vertex v a new vertex v' and the edge vv'. A100862

a(n) = n³+n for odd n, (n³+n)*3/2 for even n: Row sums of A093915. A93917

Denominators of continued fraction convergents to sqrt(864). A42669

Row sums of A126277 = binomial transform of (1, 2, 2, 3, 4, 4, 4, ...) A124671

a(n) = U_n(n)/(n+1) where U_n(x) is a Chebyshev polynomial of the second kind. A318192

Numbers whose square can be expressed as a+b·c, with a,b,c in geometric sequence. A130733

Numbers Y such that 273·Y²+91 is a square. A145526

5 times octagonal numbers: a(n) = 5·n*(3·n-2). A153795

Number of length n+4 0..6 arrays with every five consecutive terms having four times some element equal to the sum of the remaining four. A249654